YASKAWA SGD7S-****20A Series Product Manual page 207

6.3 SEMI F47 Function
 Execution with the SERVOPACK (Pn008 = n.2)
The torque is limited in the SERVOPACK in response to an Undervoltage warning.
The SERVOPACK controls the torque limit for the set time after the Undervoltage warning is
cleared.
ERVOPACK
Related Parameters
The following parameters are related to the SEMI F47 function.
Pn424
Pn425
Pn509
*
Set a percentage of the motor rated torque.
Note: If you will use the SEMI F47 function, set the time to 1,000 ms.
Important
6-18
Main circuit input
power upply
280 V
Main circuit
200 V
bu voltage
A.971 warning
Torque limit tart .
(Undervoltage)
Torque
etting of Pn424
control
0%
Torque Limit at Main Circuit Voltage Drop
Setting Range Setting Unit
0 to 100
Release Time for Torque Limit at Main Circuit Voltage Drop
Setting Range Setting Unit
0 to 1,000
Momentary Power Interruption Hold Time
Setting Range Setting Unit
20 to 50,000
• This function handles momentary power interruptions for the voltage and time ranges stipu-
lated in SEMI F47. An uninterruptible power supply (UPS) is required as a backup for momen-
tary power interruptions that exceed these voltage and time ranges.
• Set the host controller or SERVOPACK torque limit so that a torque reference that exceeds the
specified acceleration torque will not be output when the power supply for the main circuit is
restored.
• For a vertical axis, do not limit the torque to a value that is lower than the holding torque.
• This function limits torque within the range of the SERVOPACK's capability for power interrup-
tions. It is not intended for use under all load and operating conditions. Set the parameters
while monitoring operation on the actual machine.
• You can set the momentary power interruption hold time to increase the amount of time from
when the power supply is turned OFF until power supply to the motor is stopped. To stop the
power supply to the motor immediately, use the SV_OFF (Servo OFF) command.
Main circuit power interruption time
The output torque i limited to uppre
drop in the main circuit bu voltage.
Default Setting
1%* 50
Default Setting
1 ms 100
Default Setting
1 ms 20
the
The main circuit bu voltage
increa e when the main
circuit power upply recover .
etting of Pn425
Speed Position Torque
When Enabled Classification
Immediately Setup
Speed Position Torque
When Enabled Classification
Immediately Setup
Speed Position Torque
When Enabled Classification
Immediately Setup